Malicious PDF — malware analysis report

Static analysis result for SHA-256 1305f9d9c2f0d707…

MALICIOUS

PDF

49.3 KB Created: 2020-07-21 10:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06d59c0b633eb3ef3d2c92af0c4537d1 SHA-1: c1ae98ee10acd1d3724b7c42130a35d086670f1f SHA-256: 1305f9d9c2f0d707adb7fa695c3ae57a0dc678259d2ddb12451ca48682d8b24c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.com/wb?keyword=philosophy%20of%20education%20essay%20pdf, is identified as a known malicious redirector. The document's structure suggests a link farm designed to drive traffic to malicious infrastructure, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=philosophy%20of%20education%20essay%20pdf
    • http://files.sophiebehal.com/uploads/1/3/0/7/130740464/97873ee4434e96b.pdf
    • http://files.jdbscholarship.com/uploads/1/3/1/0/131069968/4547042.pdf
    • http://files.poetryxhunger.com/uploads/1/3/1/8/131856619/wuvuw_nikojo_safop_merakavome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/rijewarigasutitizirumibib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/vanakosutokonovaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://nobijip.files.wordpress.com/2020/07/11772990999.pdf
    • https://fesopalom.files.wordpress.com/2020/07/zipab.pdf
    • https://wekusov.files.wordpress.com/2020/06/60421407042.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/takedinuvejipususukagugit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/gepawetofunokaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/98265250440.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/nurum.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/20604720305.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/69072925125.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/zikorogafilarigexaxezu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008518.bin
0f10f46632c2e9d8a007588a7fdc4037fddfbe53b9e23fe60d826d1f3e414845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8518 5132 bytes
font_01_sfnt_off0000968b.bin
d671aab6fb633a834765ffdc6e135537f94cac502fc2cc13a7ea625957a60c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x968B 9840 bytes

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